No worries, let them be. At racking time they'll stay on the surface, just leave them along with the sediment behind.
As an aside, you'll see all sorts of strange things in those fermentors. As long as they don't look like fuzzy mold, you should normally have nothing to worry about.
Event Horizon ~ A tribute to the miracle of fermentation.
Brew what you like. Do this, and you will find your inner brewer.